What is this!? Mini Star Fish?

Scizzle

New member
My friend told me there's a specific place to post this but i couldn't find it!

Anyway"¦
We only have live rock from about 5 different stores, and an emerald and a cleaner crew, The tank is just a few weeks old! What is this thing?
It looks like a mini starfish?
It was in the water on my heater, i pulled it to take the picture.

starfish.jpg
 

bboudreaux

New member
they are harmless, but believe me they will reproduce in the thousands. remove them everytime you see one or you will be sorry. i have a harlequin right now and even she can't keep up with them probably gonna have to get her a mate to help out.
 

cloak

New member
I don't trust them. I remove them on sight. The fact that they can reproduce to plague like proportions alone is reason enough to get rid of them IMO.
 
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snorvich

Team RC member
Team RC
I don't trust them. I remove them on sight. The fact that they can reproduce to plague like proportions alone is reason enough to get rid of them IMO.

My question has been: What do they eat? Until I am totally sure of that, I distrust them.
 

64Ivy

B'rer Reefer
Team RC
I've got thousands of them. Literally, thousands. No problems other than aesthetic.
 

cloak

New member
My question has been: What do they eat? Until I am totally sure of that, I distrust them.

I agree. There were some weird spots on the side of my tank the other day. My guess is that is was an asterina star. If they can make marks like that on coralline algae, a thirst for corals (sps) would be a whole different story. "Show's over!"
 

sponger0

New member
Have tons of them in my tank and never seen them harm anything. But if you wanna know how many you have...look when the lights go out. Thats when they come out.
 

Blayz77

New member
not sure how these got into my tank since i started with dead rock, but i have them too. as far as what they eat ive noticed at least in my tank they will eat coraline algea which is unfortunate. fo those of you who notice little white spots or fading purple color on the rocks thats these little buggers eating.
 

cloak

New member
I bought an emerald crab once before. It didn't do much for the valonia I had, but after awhile my zoanthids didn't seem to look as good anymore. It was a quick fix.

FWIW.
 

Reefnut2010

New member
I have a lot of these suckers everywhere and my Purple Coralline is almost gone. I'm starting to syphon as many as i can out with every water change. I did not mind them at first, but now I don't like them. They're everywhere and it's and eyesore, Plus I really liked my Purple Coralline.
 

Meshmez

Active member
so i never noticed any harm done by the stars... until today. i have lots of lps and softies that they seem to leave alone, but last night i put my first small sps frag in my tank, today i came home from work to see a star on the bottom part of the frag, and the whole base of the sps frag no longer has any polyps, its POSSIBLE they are just retracted from the annoyance, but it looks completely white and sucked out, where before even when retracted you could tell there was something in there...
 

dzhuo

New member
Lots of Asterina have not been fully identified and their dietary requirement is still a mystery. There is absolutely no way anyone would be able to correctly identify an Asterina with a single photo. With all known Asterina, roughly 50% of them eats and hunts actively eating algae and anything they can overpower (including both hard and soft corals). Generally speaking, Asterina should be removed due to the highly uncertainly of unknown (for example, a shortage of algal might force them to eat corals). Basically, you are taking a risk with them (like many crabs and shrimps).
 
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